It's funny. With the new kickoff rules, the decisionmaking responsibility for returning kicks has changed.
It used to be there were two guys back to receive the ball. One would catch, and the other guy would make the decision as to signal to down the ball or to block and expect the returner would follow you. Occasionally there would be a miscommunication which usually led to a ball being returned when it shouldn't have been.
Now they changed the rule so that you don't have to catch the ball in the end zone. if it hits the end zone at all it's dead and a touchback. So now they just have the returner stand at the goal line. If the balls over his head, he just stands there and lets the ball hit for a touchback. If it's at the goal line or shorter, the returner catches it and brings it out. So now the decision is solely with the returner. In Ty Montgomery's case, there wasn't an extra set of eyes on him to prevent him from doing the dumb thing of bringing it out.